Sprocket wheel



Feb. 5,1924; 1,482,896

I H. H. HUNTINGTON- ET AL SPROCKET WHEEL Original Filed Augfzo, 1919 nPatented Feb. 5, 1924. I

UNITED STATES OFFICE.

HIRAM E. HUNTINGTON AND EDWARD H. CURETON OF RICHMOND, INDIANA.

SPROCKET WHEEIi.

Original application filed August 20, 1919, Serial No. 318,630. Dividedand this application filed April 17,

v 1922. Serial No. 554,307.

To all whom it may concern:

Be it known that we, HIRAM H. HUNT- INGTON and EDWARD H. CURETON,citizens of the United States, and residents, respectively, of Richmond,in the county of Wayne and State of Indiana, and of Richmond, in thecounty of Wayne and State of Indiana, have invented certain new anduseful Improvements in Sprocket Wheels, of which the following is afull, clear, and exact specification. 1

This invention relates to improvements in sprocket wheels and moreparticularly to one formed from a metallic band which has the sprocketteeth struck up or punched therefrom and is afterward rolled into theform of a circle or hoop to form the wheel, and this application is adivision of our copending application, Serial No. 318,630 filed August20, 1919.

The principal object of the invention is to provide a form of toothwhich may be readily struck up from the metallic band to extend radiallytherefrom and shaped to provide for efi'ective engagement with the linksof a sprocket chain and be of suflicient strength to withstand workingstrain.

A further object of the invention is to provide novel and improved meansfor connecting the ends of the metallic band and also for securing theband to a support or driving part such as the spokes of a wagon wheel.

In the accompanying drawings Fig. 1 is a side elevation of aconstruction embodying the improvements.

Fig. 2 is a plan view of same.

Fig. 3 is an enlarged plan view of a portion of a sprocket tooth.

Fig. 4 is an enlarged side view of a portion of same.

Fig. 5 is an enlarged section on the line 5-5 of Fig. 3.

Fig. 6 is a vertical section of a portion of the rimand one of thesupporting brackets shown attached to a wagon wheel spoke.

The toothed rim embodying the improvements is one especially intended tobe attached to the wheel of a farm wagon for the purpose of transmittingmotion to the seeding devices of an end-gate seeder. Heretofore, it hasbeen usual to employ cast iron sprocket wheels for the purpose,

but the breakage of these cast iron wheels resulting principally fromshipping has been a serious drawback, and in order to overcome thisobjection we have devised a I wheel of the following construction.

Referring to the drawings, 1 represents a steel band having suflicientflexibility to enable it to be rolled in the form of a hoop. When in aflat condition, the band. is punched to provided a series ofradially'extending teeth 2, equally spaced throughout the length of theband. The teeth are cut or punched from the band longitudinall of itslength of a tapering form so that the top of each tooth will be narrowerthan its base, as indicated in Fig. 3, and the teeth are bent back atright angles so that they will extend in a radial direction when theband is rolled to a circular form. The width of the cut for each toothis such that the width of the tooth will be considerably greater thanits thickness, represented by the thickness of the band. The forwardface of each tooth, or that face which engages the links of the sprocketchain, is of slightly convex form, as shown best in Figs. 3 and 5 andindicated by 2*, so as to present a rounded surface to the links of thechain and thereby reduce the wear between the parts.

As shown in Fig. 1 the ends of the band after being rolled into the formof a hoop are secured together by an angle iron bracket 3, one wing ofwhich is riveted to the inner periphery of each end of the band.Additional brackets 4, 5 and 6 of similar form are likewise secured atequal distances about the inner periphery of the rim. The brackets 3 and5 are provided with slotted openings 7, while the brackets 4 and 6 haveround openings 8 and these brackets are designed to receiveU-shapedclips 9 which are placed about the spokes 10 of the wheel to which thesprocket rim is attached for the purpose of securing the rim in positionon the wheel; nuts 11 serving to securely clamp the brackets inposition. The slotted openings 7 are longer than the width of the clips9 so that the clips may be brought in registry with the spokes of thewagon wheel.

B the construction described, it will be seen that a very simple, strongand efiicient sprocket wheel is formed which may be readily applied tothe spokes of a wagon wheel, and in which all danger of breakage byshipping or ordinary use is eliminated; also one in which the teeth willbe effective for their purpose, being so formed as to present wide,rounded faces to the chain and being of suflicient strength to resistall driving stresses as well as occupying the proper radial position.

While we have shown and described the rim formed from a fiat band orbar, which is the preferable form, we do not wish to be confined to thisparticular shape, as good results may be obtained with bands or bars ofangle, channel, oval, half-oval or other shapes.

We claim:

1. A sprocket wheel comprising a flexible band bent into circular formand provided with sprocket teeth struck out radially therefrom and aplurality of supporting brackets fixed tothe inner side of the band atspaced points in its circumference, one of which has the unitedends ofthe band fixed thereon.

2. A sprocket wheel comprising a flexible metallic band bent intocircular form and provided with sprocket teeth struck out radiallytherefrom, and a plurality of supporting brackets fixed to the innerface of the band at spaced points in its circumference one of saidbrackets having the ends of the band, riveted thereon, said bracketscomprising angularly bent plates having one wing fixed to the band andthe other wing provided with openings for attaching it to a wagon wheel.

In testimony whereof we affix our signa- Witness to signature of HIRAMH. HUNT-.

ING'roN: Q

' OWEN L. LOOFBOURROW.

Certificate of Correction.

It is hereby certified that Letters Patent No. 1,482,896, grantedFebruary 5, 1924, upon the application of Hiram H. Huntington and EdwardH. Cureton, of Richmond, Indiana, for an improvement in Sprocket Wheels,were erroneously issued to the inventors, said Huntington and Cureton,whereas said Letters Patent should have been issued to The AmericanSeeding Machine Company, of Springfield, Ohio, a Corporation of Ohio, asassignee of the entire interest in said invention, as shown by therecord of assignments in this ofiice; and that the said Letters Patentshould be read with this correction therein that the same may conform tothe record of the case in the Patent Oflice.

Signed and sealed this 18th day of March, A. 1)., 1924:. A

[snAn] KARL FENNING,

Acting Oommz'ssz'oner 0 f Patents.

